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G. T. TRUNDLE, JR. MULTIPLE DRILLING MACHINE.

APPLICAHON IILED IAN.3X, I916- latenfed June 10, 1919.

4 SHEETSSHEET 1.

G. T. TRUNDLE, JR.

MULTlPLE DRILLING MACHINE.

APPLICAHON HLED JAN-31.19M-

Patented June 10, 1919.

4 SHEETS-SHEET 2.

W flaw/n G. T. TRUNDLE, JR.

MULTIPLE DRILLING MACHINE.

APPLICAHON HLED JAN-3h \916- Patented June 10, 1919.

4 SHEETSSHEET 3.

39 fi vfl Wf/UM/Q G. T. IRUNDLE, JR. MULTIPLE DRILLING MACHINE. APPLICATION HLED JAN.3\. I916.

Patnted June 10, 1919.

4 SHEETS-SHEET 4.

enonen T. TBUNDLE, m, or CLEVELAND, 01:10, ASSIGNOR 'I'O MULTIGRAPH comm, or CLEVELAND, one, A conronarron or OHIO.

T MULTIPLE-DRILLING MAG.

Specification of Letters Patent. Patented June 19,1919.

Application filed January 31, 1918. Serial No. 75,207.

suitable blank. The invention is particularly well adapted for drilling radial holes into such blank. Another object is to enable the mechanism to be mounted 'on the table of an ordinary drill press and receive its motion from the rotatable and longitudinally movable spindle of such press. The-invention is hereinafter more fully described and the essential characteristics are set forth in the claims.

In the drawings, Figure 1 is aside elevation of the mechanism of this invention, to-, gether with so much of a drill press as car' ries and operates such mechanism; Fig. 2 is a vertical central section of the mechanism of this invention. In this figure, the drilling mechanism is in the same general position as in Fig. 1, but the drill press structure is shown at right angles to such parts in Fig. 1, for convenience of illustration. Flg.

3 is a detail, illustrating the joint between the individual drill s indles and the operat ing levers therefor; ig. 4 is a plan of the mechanism of this invention, being sectioned through the sleeve which surrounds the spine dle of the drill press; Fig. 5 is a plan of that portion of the mechanism which supports and positions the blank to be drilled; Fig. 6 is an enlarged detail of the blank positioning and holding device, being in part a vertical section at the axis of'the structure; Fig. 7 is a plan, and F ig. 8 a side elevation, of a suitable article orblank drilled by this invention.

As shown in Figs. 1 and 2, 10 indicates the frame of an ordinary drill press, 11 the work table, and 12 an arm carried by the frame for supportin the table. 13 indicates the vertical spin e which is driven by bevel gears 14 and 15, the latter on a drive shaft 16. The spindle 13 is vertically movable, being splined in the hub of the bevel car 14. This spindle is rotatable in a sleeve 1 which has a rack 18 connected with a pinion 19 carried by the frame and having a handle 20 whereby it may be operated. Turning this handle moves the sleeve up or down, and thus correspondingly moves the spindle while it is rotating. 7

So much of the construction as is above described is the usual one in a drill press, wherein the spindle at its lower end has a tapered bore' in which seats the tapered end of a drill. My mechanism, which will now be described, connects with the sleeve 17 and with the tapered socket in the lower end of the spindle 13, and at its lower end rests on the table 11.

Referring first to Figs. 1, 2 and 5, 20 indicates a suitable base-plate adapted to rest on or be clamped to the table 11. -This baseplate has rising from it a number of lugs 21 i to which is "secured a frame member 22 of approximately the form of an inverted cone. As shown, this frame member is made in three castings,'namely; a lower member 25 which has downwardly extendin lugs 26 bolted to the lugs 21; an intermediate cast- .ing 30 which has several hollow bosses 31 extending diagonally and radially toward the axis of the structure and a top plate 35 e which has a central or longitudinal hub 36. These parts 25, 30 and 35, are all rigidly secured together.

Mounted in each of the bosses 31 is a sleeve 40 on the inner end of which is a bevel pinion 41. All of these pinions oonnect with a central master gear 43, which has a central axially extending hub 44 rotatably mounted in the sleeve 36'. Thus when the hub 44 is rotated, each of the sleeves 40 is correspondingly rotated. Splined in the sleeves 40 are individual drill spindles 50 which are compelled to rotate with the V sleeves but may shift in and out therein. These spindles are shown as extending through and guided by the body of the lower casting 41. Each spindle carries a suitable drill point 51.

The master gear 43 at its hub 44 is splined to a central stud 60 which has a tapered shank 61 adapted to fit tightly. in the lower end of the drill spindle 13. Accordingly the rotation of the spindle is communicated to the gear 43 and thus to each of the individual spindles 50 and drills 51.

Tightly clamped on the drill press sleeve 17 is a sleeve 70. This is shown as made of block 73, and at its lower and outer end with a corresponding drill spindle 50. The connection with each block 73 is by a pin and slot. The connection with the drill spindle is as shown in Fig. 3, that is to say the lever is connected by a'pin and slot 93 with a block.

95 which has a shank 96 swiveled in the end of the drill spindle 50, the pin 97 occupying an annular groove in the shank 96 preventing the separation of these parts.

From the construction described, it will be seen that the spindles 50 may rotate independently of the levers 90 and blocks 95, but that these spindles will be shifted in and out when the levers are rocked, on their pivots, as they'- will be by the raising or lowering of the sleeve 70. It will be apparent, therefore, that with my mechanism the simple rotation of the drill press drive shaft 16 rotates all of the radial drills 51, while the simple movement up and down of the drill press sleeve 70 causes the drills to move radially inwardly or outwardly, as the case may be. It will thus be seen that I have provided a very simple mechanism enabling the standard drill press to cause a number of drills to act radially on a suit- I ably held blank. Moreover, as shown in-the sition the blank.

drawings, these drills may be arranged to move 1n diagonal radial paths. I will now describe a convenient mechanism for positioning the blank to be drilled.

Fig. 7 and Fig. 8 indicate at A a suitable plug or disk-like structure which the mechanism of the other views may conveniently drill, the drilled holes being indicated in these views at a. The mechanism for positioning and holding such a structure is best illustrated in Figs. 2, 5 and 6. In these views 100 indicates a suitable plate or bar which is shown as pivoted at 101 to the bed or frame 20 of my mechanism. At an intermediate point, as 102, this bar is formed with an upwardly facing depression, in

which seats a suitable block 103, Fig. 6, formed according to the particular blank to be drilled. As shown in this view the blank A has on the under face openings (1', and the block is accordingly provided with pins 106 adapted to occupy these openings to po A suitable pin 108 holds the block in position in the bar 100.

The bar 100 may be swung into the position shown in dotted lines in Fig. 5, where the blank may be easily inserted by hand in the recess 102; then the projecting end of the bar forms a convenient handle for swinging it so as to carry this blank directly beneath the axis of the drill press spindle.

To hold the blank firmly down on the block 103 when it is positioned, I provide the spring press plunger 110 shown. in Figs. 2 and 6. This plunger is mounted in a recess in the frame casting 25 and is pressed downwardly by the helical compression spring 111. In this plunger is an annular groove 112, into which extends the bifurcated end of alever 115 pivoted at 116 to a lug on the under side of the casting.

When it is desired to position the blank, the lower end of the lever 116 is manually pressed downward, thus raising the plunger' article to the edge of the structure, where it may be removed by hand.

It will be understood that various refinements and adjustments of the mechanism shown may be made if desired. I have found, however, that the mechanism substantially as shown gives very satisfactory results. It may be stated that each of. the drills 51 is carried by a suitable chuck 120 on the inner end of the spindle '50, so that any suitable sized drill may be employed. The sleeves 40, which carry the bevel pinion 4.1, are shown as held in place by nuts 121 on their outer edge, between which and the bosses on the casting 30 are suitable hearing washers 122. Also the sleeve 44 of the master gear is shown as held in place by a nut 125, a suitable bearing washer 126 being between this nut and the frame sleeve 36. Washers 128 are also shown as provided between the hub of the sleeve 70 and a collar 129 on the lower end of the spindle 17. There are also shown bearing washers 130 around the swivel shank 96 and between the block and the drill spindle 50. These anti-friction or wear provisions are illustrative of refinements which may be employed wherever desired. i

It will be seen that by simply removing these bolts 71, disconnecting the sleeve 70 from the levers '90, then raising the drill press sleeve and spindle, my device may be entirely freed from the drill press, the driving pin 60 being knocked out of the spindle by the usual wedge or driftingpin inserted at 135, Fig. 2. Conversely, all that is needed to install themechanism is to place it on the table of the drill press, insert the tapered end of the driving pin 61 tightly in the socket of the drill press thimble, clamp the sleeve .70 thedrill press -s' A nect the pivot blocks '73 with the levers 90.

Having thus'described my invention, what I claim is:

-1.- The combination, with a drill press having -a shiftable sleeve and a rotatable spindle therein, having a tapered socket at its lower end, of a radial drilling device having a plurality of drill spindles and a master driver geared therewith and provided with an actuating member adapted to occupy said socket, said radial drilling device having shifting mechanism for such spindles connected with the shiftable sleeve of the drill press.

2. The combination, with a drill press having a table, a shiftable sleeve and a ro- I having a table, a shiftable sleeve and a 1'0- tatable spindle within the sleeve, of an at tachment adapted for mounting on the table and comprising a series of sleeves having pinions, a master gear meshing with such pinions, means for connecting said master gear with the drill spindle, individual spindles rotatable with said sleeves, and means connected with the drill press sleeve for shifting said individual spindles through their sleeves. v

4 The combination, with a drill press having a table, a shiftable sleeve and a rotatable spindle within the sleeve, of an attachment adapted for mounting on the table, and comprising a series of pinions, a master gear meshing with such pinions, means for connecting said master gear with the drill spindle, individual spindles splined within said pinions, levers for operating individual spindles, and means connecting said levers with the shiftable sleeve of the drill press.

5. The combination with a drill press having a table, a rotatable spindle with a socket in its lower end and a shiftable sleeve surrounding said spindle, of an attachment adapted to seat on said table and having a driving device adapted to make connection with said socket, individual drill spindles rotated simultaneously by said driving device, and means connected with the shiftable sleeve of the drill press for shifting the individual drill spindles.

6. The combination, with a drill press having a table, a rotatable spindle with a tapered socket at its lower end, and a shiftable sleeve carrying said spindle, of an ataa at to ma e connection with the tapered socket, radial-sleeves driven by such driving gear, individual drill spindles in said sleeves, a series of levers for-shifting the individual drill spindles, and a connection between said levers and the shiftable sleeve of the drill press.

7. In a device of the character described, the combination of a base plate havingupwardly extending ears, a hollow frame se-- cured to said cars, a series of sleeves mounted in one wallof the frame, pinions on said sleeves within the hollow of the frame, spin: dles extending through said sleeves and 00- cupying the other wall of the frame, a gear meshing with said pinions and having a hub in said frame,a longitudinally shiftable stud splined within said'hub and having means for engaging the spindle of a drill press, and means adapted to engage the longitudi nally shiftable-sleeve of a drill press and operate the individual spindles mentioned.

8. The combination, with the table, spindle and shiftable sleeve of a drill press, of an attachment having a base plate adapted to rest on the drill press table, a casing carried by tachment adapted to seat on said table and 'havm a driving gear'with a device adapted the base plate having its interior hollow, a

series'of sleeves mounted in the outer Wall of the casing, pinions on said sleeves'within the hollow of the casing, an axially mounted gear meshing with said pinions, individual drill spindles occupying the sleeves, a stud engaging the spindle of the drill press and slidably engaging the hub of said gear, a series of levers connected with the individual spindles, and a sleeve clamped to the sleeve of the drill press for operating said levers.

9. The combination, with a drill press having a shiftable sleeve and a rotatable spindle within the sleeve, of an attachment therefor having a stationary frame and a series of rotatable pinions on radial axes, a master gear meshing with such pinions, means for connecting said master gear with the drill spindle, individual spindles rotatable with said pinions and axially shiftable through them, and means connected with the drill press sleeve for shifting said individual Spindles.

10. The combination, with a table, a frame carried thereby, a plurality of radially acting drills carried by the frame, means for rotating said drills and shifting them in and out, a lever pivoted to the table having a socket for carrying a blank to be drilled, and a spring-pressed plunger adapted to press down on the blank held in said socket.

11. The combination of a series of radial, diagonally placed drills, means for rotating them and shifting them longitudinally of their axes, means for moving a blank into and out of the position toward which the drills point, a spring-pressed plunger adapted to engage said blank, and means for moving said plunger away from the blank.

12. In a device of the character described, the combination of a base plate and a hollow frame carried by and above it, a series of individual spindles extending through a wall of the frame, pinions on said spindles within the hollow of the frame, a gear meshing with said pinions and having a hub in said frame, a longitudinally shiftable stud connected with said hub and having means for engaging the spindle of a drill press, and means adapted to engage the longitudinally shiftable sleeve of a drill press and operate the individual spindles mentioned.

13. The combination of a table, a frame carried thereby, a series of radial sleeves mounted in the frame, bevel pinions on the respective sleeves for rotating them, a mastergear meshing with said pinions, individual drill spindles in the respective sleeves, means for moving said spindles in and out in the sleeves, a master operating device for said moving mean-s, means for positioning a blank on the table at the common point toward which the drills point, and a central plunger axially mounted in the frame and pressing toward the table and adapted to clamp the blank to be drilled.

14. The combination of a table, a lever having a socket for the blank to be drilled,

said lever being pivoted to the table where-- by the blank may be shifted toward and from an active position, a frame carried by the table about the lever, a series of radially mounted drills carried by such a frame and pointing toward such active position, means for rotating the drills simultaneously and for simultaneously shifting them in and out, and a plunger carried by thev frame and adapted to press toward the table to position the blank carried in said socket.

15. The combination of a table, a hollow frame above the same, a series of sleeves mounted within the upper wall of said frame, pinions on said sleeves in the hollow of the frame, a master gear mounted on a Vertical axis within said hollow and geared with said pinions, longitudinally shiftable spindles mounted in said sleeves and splined thereto and carrying drill points at their inner and lower ends, a device having a socket for stock and adapted to move said,

stock to or from the position toward which all these drills point, a plunger carried by the frame, a spring pressing said plunger downwardly against said stock, and a series of levers pivoted to the frame and adapted to force said drills longitudinally inward or outward simultaneously.

16. The combination, with the table,

spindle and shiftable sleeve of a .drill of an attachment having a base plate adapted to rest on the drill press table, a frame carried by the base late, a series of sleeves mounted in said fi ame, pinions on said sleeves, an axially mounted gear meshing with said pinions .and connected with the drill press spindle, individual drill spindles carried by the base plate, a series of pinions mounted on radial axes in said frame, a gear mounted axially of the drill press in said frame and meshing with said pinions and connected with the drill press spindle, individual drill spindles extending through the pinions and rotatable with them, and means connected with the sleeve of the drill press for moving the individual spindles along their axes.

18. In a multiple drilling machine, the combination of a base, a stationary frame supported thereby, means carried by the base and the frame for positioning a blank between them, a series of radial spindles mounted within the frame and shi-ftable along their axes, pinions surrounding said spindles and rotatable therewith, said spindles being shiftable through the pinions, a

-master gear journaled in said frame and meshing with said pinions, and means for rotating said master gear and for simultaneously shifting the spindles on their own axes.

19. In-a multiple drilling machine, the combination of a stationary base, a stationary frame secured thereto, means carried by the base and the frame for positioning a blank between them, a master gear press,

within the frame journaled on a vertical axis in the top of the frame, pinions on radial axes within the frame meshing with said gear, radial spindles extending through the pinions, with the spindles and intermediately pivoted to the frame, a rota-table driving'shafit coaxial with the master gear and directly connected with it, and a shifta-ble sleeve surrounding said shaft and connected with said levers.

aflix my I11 testimony whereof, I hereunto signature.

GEORGE T. TRUNDLE, JR.

a series of levers connected 

